Uplink Reference Signal for Downlink Beam Indication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile communication systems face challenges in supporting explosive data traffic, high data rates, a large number of connected devices, very low end-to-end latency, and high-energy efficiency, particularly in providing advanced beam indication for downlink signals.
Innovation Solution
The method involves receiving configuration information related to a transmission configuration indicator (TCI) state, which includes information for an uplink reference signal (UL RS), and using this information to receive downlink signals based on a spatial domain filter related to the UL RS, specifically utilizing sounding reference signals (SRS) for beam indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If downlink beam indication uses traditional reference signals, then beam indication is provided, but latency is increased and operational flexibility is reduced
Solution Approach 1:
The uplink reference signal is configured to serve dual purposes: it functions as an uplink reference signal for channel estimation and as a downlink reference signal for beam indication. This multi-functionality eliminates the need for separate downlink reference signals, reducing latency while maintaining operational flexibility through unified signal management
Solution Approach 2:
The patent combines the functions of uplink and downlink reference signals into a single unified reference signal structure. By merging these functions, the system reduces the number of separate signaling operations required, thereby reducing latency while preserving the ability to adapt to different operational scenarios through flexible configuration
2Device complexity
If separate downlink reference signals are used for beam indication, then beam indication is provided, but device complexity and signaling overhead increase
Solution Approach 1:
The uplink reference signal is configured to serve dual purposes: it functions as an uplink reference signal for channel estimation and as a downlink reference signal for beam indication. This multi-functionality eliminates the need for separate downlink reference signals, reducing latency while maintaining operational flexibility through unified signal management
Solution Approach 2:
The patent extracts the essential function of downlink beam indication from the traditional downlink reference signal structure and implements it using the uplink reference signal. By taking out the beam indication function and combining it with the uplink reference signal, the system reduces signaling overhead while preserving beam indication capability through the spatial domain filter configuration
Data Source
AI summary
A method for a terminal receiving a downlink signal in a wireless communication system, according to one embodiment of the present specification, comprises the steps of: receiving configuration information associated with a Transmission Configuration Indicator (TCI) state; and receiving a downlink signal on the basis of the configuration information. The configuration information includes information indicating an uplink (UL) reference RS, and the downlink signal is received on the basis of a spatial domain filter associated with the UL reference RS.